adams



W. G. ADAMS. TUNE ARM fos P Ho'NoGRAPHs.-

APPLICATION FILED AUG.30.1915.

1,236,644. Patentdmlg. 14.1917.

E Ill lli" /ffwf' UNTTED STATES PATENT orricn WILLABD o. ADAMS, or wEEnsPonT, NEW YORK.

TONE-ARM For. PHoNoGRAPHs.

Application filed August 30, 1915. Seria1 No. 47,995.

To aZtwL'o-m it may Concern Be 1t known that I, VILLARD G. ADAMS, a

' citizen of the' United States of America,

and resident of lVeedsport, in the county of Cayuga, in the State of New York, have invented new and useful Improvements in Tone-Arms 'for Phonographs, of which lthe following, taken in connection with the accompanying drawings,is afull, clear, and exact description.l

This invention relatesy to cert-ain improvements in sound reproducing machines, com-- the surface of the disk or cylinder, and that unless the stylus of the reproducer is properly adjusted tojsuch angle, the result must be excessive wear or mutilation'of the record and objectionable stridulation or grating sound, and I have discovered that-the frequent criticisms of otherwise perfect instruments of this character is 'largely due -to improper 'adjustment of the stylus of the reproducer with reference to the angle of`V production of impressions upbn the records.

The main object, therefore, of my present invention' is to enable the stylus of the reproducer to be closely adjusted to the angle of production of the impressions upon the record ,while the machine is in operation so that the'reproduced sound willl be practically free from'such stridulations and will,

therefore, represent more closely the original sounds' or tones.

Another object is to enable the same reproducer and resonator to be used in connection with any. standard vmake' of sound reproducing machine. g Other objects and usesrelating to specific parts of the device will .be brought kout 1n the following description.

In the drawings Figure 1 is a perspective view of a simple form of phongraph embodying the features of my invention. v

F ig. 2 is an enlarged detail sectlonal View,

Specification. of Letters; Patent.

amplifier.

Patentednug. 14, 1917.y

partly broken away, of theL resonator carry- .ing the reproducer. f Flg. 3 is a, sectional view taken on line Figs. 4 and 5 are detail sectional views taken, respectively, in the 'planes of lines 1 -4, and 5--5, Fig. 2, but on duced scale.

This resonator is adapted tov be used lin a slightly re-- connection with any suitable form of amplitler .as -a and comprises a hollow base 1- covering the reduced end of the amplifier faand provided with a rela-tively large circular chamber -2- and an inlet 3f and an outletV -4-, the latter communieating directly w-iththe interiorfof thef ampllfer -a-.

The inlet -3- is preferably circular and 'co-axial with the 'base' -l in the` upper side thereof, and serves to-receive the lower end of an upright tube 'fwhich is of relatively smaller .diameter thanthat of the chamberv -4- and serves tor receive the lower end of another upright tube-6 `which is of still smaller diameter than-.that

of the interior of the tube -5,.'and is adapted to be adjusted vertically ina manner presently described-the lower end of the ,tube -6- being provided 'with radial openings `7-, the combined area of which is somewhat greater than the -cross sectional area of the interior of the'tube--G-w The purpose in making the interior of the tube 5* of relatively larger dia-meter than j that of the tube -6-, andalso in making the chamber --2- of relatively larger diameter than that of the tube --d is toform intervening amplifyingr chambers vto ``ve greater fullness or volume to the soun it emergesinto the amplifier -abylpermitting `the soundwaves to enlarge in transit from the main column or tube f6- to the amplifier.

The lower end of the tube -6- below the radial openings 7- is closed by a cap' or plug -8'-,. the efectfof which appears to be to increase the fullness of the sound waves by retardilig their direct passagel ,to the Asillust'rated, the base -1- is supported direct-ly upon a horizontal partition bof a case -A- 'having an upper wall or top -,a-- to which the upper end of the tube v'-5- is secured, said tube extending through the inlet opening 3 in the upper `:vall of the base -land fits more or less andy secured' by screw -connecside of the base #1,

to which the section 1l-- is adjustably connected by screwedv gagement. j

The 'tube *s6- is provided atits upper end with a screw cap -12- having a ceni der lllon the section supported n -6-- and partsl carried thereby inits lower face for receiving a similarly formed shoul- -llso that the tube -6-. and parts carried thereby are directly upon. the' section e411- vofthe rod *9fand byy turning said section in' one direction or the other, the tube i .may be raised and lowered at will, theuppery end of tral semi-spherical 'seat ,-lm

the section E11-f being reduced and thread- *suitable ed atv *F15-- for .engagement by by which the tube vgis firmly held in .place against vibration or rattling1 '-5` to permit the vyertical adjustment re erred to. l

The upper end of the tube*-6 just below the cap l2-fris provided inV one side with a relatively large radial opening #18 in direct communication with the interior of a. laterally projecting tube 1 9- which is connected to the tube -6 by a hingejjjoint 20- to allow the tube #19- to be tilted to vdifferent angles relatively to the axis-of the tube t3-'tithe inner end of the tube *19*- beng PIOVldedlwith a relatively large Opening p21 for the y purpoge. of

. maintaining communication with the opena radial opening #-27 als' extension.

' ing -,18- in any position of adjustment .of

the tube --19.

The lateral `tube .-19--is` provided with Q3-- fitted suffina telescoping extension accidental turning mit it to be adjusted for properly positioning the' stylus of the reproducer on the record, said extension terminating. in a T-shaped head 24.-- 1n which is journaled la tubular sleeve Q5-'- carrying the reproducer #26- andl nvavingv y communicatingy with the interior 'of the tube 19sthrough the A radiallyprojecting weighted arm 2S-4 is securedto-Athe sideY ofthe sleeve 25 opposite the opening 2-l and plays in a vertical slot .-29-- in the adjacent sideot section ,-11-3 the lower sectiony loe-- vand is provided with aj i sleeve,

it being understood that the lower portion of the. tube +6- is slidably fitted4 vin the .hollow head'as -17- of the tube upright tube hold the the head 24g-'- and v4serves to rock the reproducer -26`- in one direction for holding its stylus asffsf j record disk under a slight.pressure7 inl contact with the the fit Vbetween the sleeve w25-#and head Q4- being sufici'ently y'with the reproducer, by the Weight.

loose to permit it, together to be adjusted rotarily 'The reproducer Q6- is provided with a hub 431-- frictionally fittedwithin one end i of the sleeve ,425,- with sufficient friction lto cause the reproduoer to turn with the 4o r rather to prevent relative turning of the :sleeve and reproducer under the weight of the arm --28- when the stylus is engaged with the record disk, but may be turned .by hand relatively to said 'sleeve in removing andl replacing it' from land upon the sleeve or when it is desired to change the angle of the stylus relatively to the sleeveot' the record disk, the hub ofthe reproducer being connected to the sleeve against endwise displacement by any of the well known forms of bayonet locks or joints so .that it may be easily and quicklyv removed or replaced at will. l

' In ladjusting the reproducer so as' to change the angle of the stylus relatively to the surface of the record disk, it, of course, becomes necessary to raise or lower the tone arm which may be readily done by turning the sections-11- of the rod 9fin one .direction or they other,as -may be required, or the lateral arm 19 may be adjusted @vertically by separate means, as a screw 432e-, engaging in a threaded aperture in abracket #-33- on'the arm --19-' and havingits innerend -provided with a Jfoot #3lresting against the periphery of the w'6-- so that by turning the screw .M32 reproducer will be raised or lowered.

' The radial opening w27#- in the sleeve w25-- is of substantiallythe same diameter as that of the'interior of the extension 23-, and by connecting. the'hub of the reproducer .and slee-ve in the manner described so that theymay be adjusted relatively to each other, it is evident that the lsleeve maybe ad'usted rotarily as a valve to vary the size `o the communicating open- 1 ing between said sleeve and tone arm V-19f for subduing the. tone if desired, as for example -when the instrument is beinl played in a small room Without changing t e angler of the stylus, it being understood that the slot 29M in the head'of the lateral. arm

-19- or extension Q3- is of sufficient. length' topermit-a limited rotary adjustment sleeve for this purpose as Well as for j of said j the purpose of allowing the weight 28k-to stylus to the 'record disk-under a, slight pressure. y

IVhat I claim is: 1. In a phonograph', in combination with Ain the proper direction, theV ai record, an ampliiier supported in a' plane belowthat of the record, a tone arm having I' anupright section communicating with the amplifier, and an extensible support' for said section passing vertically -therethrough and provided With. means at the .top for adjust-f ing its lengtln- 2. In a phonograph, the combination with anamplifier and a record disposed in a plane abovethe amplifier, of a' tone armvcomprising afholloiv base in direct communication vwith the amplilier, aV vertically-adjustable l upright tube communicating with, the base,

means within said tube for adjusting `the same vertically, a lateral tube carried by the upright tube and commuriicatirigtherevvith,

and a reproducer mounted'oni the lateral tube. l A

3. VIn al phonograph, in combination with an amplifier' and a record disposed in a plane above the amplifier, anupright tube in comv munieation With Athe base, a lateral tube y hinged to the upright tube and communicat- Vnmuntfed'l on the lateral tube.

ling therewith, adjustable connections between said tubes, for adjusting the lateral I- tube upon its hinge-joint, and a reproducer f 4'. In a phonograph, the combination with fprislingfa,hollow base in direct communicationfwitlinthef.amplifier, a vertically adjustan amplifier and a record disk disposed in a ypilla,'r 1'e";above the amplifier, of a tone arm com- `upright, tube communicating .with the ,adjustable connections between the up- '.rigjlhttube'and base and extending through e .upright tube for raising and lowering visa'idupright tube, a lateral tube attached to vfffand-icommunicating with the upright tube- --and movable vertically therewith, and a rev"producer mounted on 'the lateral tube.

` jflna phonograph, in .combination with anamplifier and a record diskA disposed in "7 l[nla'ne above the amp1ifier,a hollow base surrounding the small end of the amplifier and communicating therewith, a stationary tube projecting up a'rdly` from and communicating with thel ase, a vertically adjustable tube Iprojectiii'ginto the stationary tube and adjustable connections betweenthe base 'and top of the adjustable ltube .and extending through both tubesfor supporting saidv catingivith said base, extensible connections -between the base andi-tube for 'supporting and `adjusting said tube, a lateral tube attached" to and communicating with the upright tube at a point some distance below its upper end, and a reproducer mounted on the lateral tube.

ing a hollow base liavin means for communication with an ampli er, a rod secured to and rlsmg from the base Vand havmgv its 7. A tone arm for phonographs comprisupper end provided with a "ertically ad.-

justable extension, an upright tube fsup-.f ported by `said extension and communicatingffwith the hollow base, a lateral tube hingedly connected to theupright tube and communicating therewith,'means for adjusting- `the lateral tube about the axis of its hinge connectiolnand a` reproducer mounted on the lateral tube.

my hand this 21st day of August, 1915.

lVitnesses;

H; EI CHASE, Amon M. CANNON.

In witness whereofv I have hereunto setv WILLARD o. ADAMS'. 

